impedance

• POS: Noun
• HYPHEN: im=ped=ance

CIDE DICTIONARY

impedance, n. [Impede + -ance.].

 The apparent resistance in an electric circuit to the flow of an alternating current, analogous to the actual electrical resistance to a direct current, being the ratio of electromotive force to the current. It is equal to R2 + X2, where R = ohmic resistance, X = reactance. For an inductive circuit, X = 2, where f = frequency and L = self-inductance; for a circuit with capacity X = 1
, where C = capacity.  [Webster 1913 Suppl.]

OXFORD DICTIONARY

impedance, n.
1 Electr. the total effective resistance of an electric circuit etc. to alternating current, arising from ohmic resistance and reactance.
2 an analogous mechanical property.

Etymology

IMPEDE + -ANCE

THESAURUS

impedance

capacitive reactance, clog, cumbrance, electric resistance, hindrance, impediment, inductive reactance, magnetic reluctance, ohm, ohmage, reactance, reluctance, reluctivity, resistance, skin effect, specific reluctance, surface resistance, volume resistance